Rectangular cell for photometric analysis

Abstract

A rectangular cell is a bottomed rectangular cell mounted in a photometric analyzer, and has an opening at a top end face for accommodating a test sample to be analyzed. The rectangular cell has a low flat area that is lower than an upper flat area on an inner face on a lower side of an outer face of a wall surface through which a measurement light from the analyzer is transmitted when the rectangular cell is mounted in the analyzer. This low area extends substantially over the entire width in the horizontal direction. When the rectangular cell is mounted in a recess in the photometric analyzer, an area through which the measurement light passes in the rectangular cell is not damaged by dust, even if fine hard dust adheres to the side surface of the recess. Further, the low region can have a mirror-finished surface by polishing.

1 . A rectangular cell with an open top face and a closed bottom face that is mounted in a photometric analyzer and accommodates a test sample to be analyzed by the photometric analyzer,
 wherein an outer surface of each of two side walls facing each other which are perpendicular to an irradiation direction in which the photometric analyzer irradiates light for analyzing the test sample when mounted in the photometric analyzer has a low region including a region through which the light is transmitted, and a high region which is a plane region other than the low region, and a plane including the low region is located closer to an inner surface of the side wall in the irradiation direction than a plane including the high region.   
     
     
         2 . The rectangular cell according to  claim 1 , wherein the low region reaches the closed bottom face. 
     
     
         3 . The rectangular cell according to  claim 1 , wherein the low region does not reach the closed bottom face. 
     
     
         4 . The rectangular cell according to  claim 1 , comprising:
 at each of four corners formed in the open top face between each pair of two adjacent side walls of four side walls, a flat or curved surface inclined to both of the two adjacent side walls and expanding from a lower inner side to an upper outer side.   
     
     
         5 . A rectangular cell with an open top face and a closed bottom face that is mounted in a photometric analyzer and accommodates a test sample to be analyzed by the photometric analyzer, comprising:
 at each of four corners formed in the open top face between each pair of twoadjacent side walls of four side walls, a flat or curved surface inclined to both of the two adjacent side walls and extending from a lower inner side to an upper outer side.   
     
     
         6 . The rectangular cell according to  claim 4 , wherein the flat or curved surface inclined to both of the two adjacent side walls is formed by R chamfering processing or C chamfering processing. 
     
     
         7 . The rectangular cell according to  claim 1 , comprising:
 a coating of elastic material covering an edge of the open top face.   
     
     
         8 . The rectangular cell according to  claim 5 , wherein the flat or curved surface inclined to both of the two adjacent side walls is formed by R chamfering processing or C chamfering processing. 
     
     
         9 . The rectangular cell according to  claim 5 , comprising:
 a coating of elastic material covering an edge of the open top face.